cksum(1)

     NAME
          cksum - checksum and count the bytes in a file

     SYNOPSIS
          cksum [--help] [--version] [file...]

     DESCRIPTION
          This documentation is no longer being maintained and may be
          inaccurate or incomplete.  The Texinfo documentation is now
          the authoritative source.

          This manual page documents the GNU version of cksum.  cksum
          computes a cyclic redundancy check (CRC) for each named
          file, or the standard input if none are given or when a file
          named `-' is given.  It prints the CRC for each file along
          with the number of bytes in the file, and the file name
          unless no arguments were given.

          cksum is typically used to make sure that files have been
          transferred by unreliable means (such as netnews) have not
          been corrupted, by comparing the cksum output for the
          received files with the cksum output for the original files.
          The CRC algorithm is specified by the POSIX.2 standard.  It
          is not compatible with the BSD or System V sum programs; it
          is more robust.

          --help
               Print a usage message and exit with a status code
               indicating success.

          --version
               Print version information on standard output then exit.